Monitoring and Analysis of Mining Subsidence Based on Timing Accumulation DInSAR and GIS

To obtain the space-time settlement process of mining area in long time series and verify its accuracy, we propose a kind of surface subsidence monitoring and analysis method combined timing accumulation DInSAR and GIS analysis. The method firstly selects SAR images with shorter temporal baseline to process two-pass DInSAR, and then accumulates the surface subsidence with a high coherence point in each group of deformation diagram; finally, the method combines the cumulative settlement with GIS spatial analysis tools to obtain the dynamic development of surface subsidence and rail deformation. The test used six-scene high resolution RADARSAT-2 images, and the results comparing with the leveling data shows that the method has reliable detection accuracy, and the mean absolute error is 0.018 m, the maximum subsidence error is 0.042 m.